45. the leper in whom the plague is, his clothes shall be rent, &c.—The person who was declared affected with the leprosy forthwith exhibited all the tokens of suffering from a heavy calamity. Rending garments and uncovering the head were common signs of mourning. As to "the putting a covering upon the upper lip," that means either wearing a moustache, as the Hebrews used to shave the upper lip [CALMET], or simply keeping a hand over it. All these external marks of grief were intended to proclaim, in addition to his own exclamation "Unclean!" that the person was a leper, whose company every one must shun.

     7. cover their lips—The Orientals prided themselves on the moustache and beard ("upper lip," Margin). To cover it, therefore, was a token of shame and sorrow (Le 13:45; Eze 24:17, 22). "They shall be so ashamed of themselves as not to dare to open their mouths or boast of the name of prophet" [CALVIN].